OpenGL Extensions Viewer 6 | realtech VR


New version 6.0 for Windows, now available, 20th Anniversary of OpenGL Extensions Viewer, with CPUID
New version for Mac, CPUID, and Apple Silicon native support, Metal and other improvements.

A reliable software which displays useful information about the current OpenGL 3D accelerator and new Vulkan 3D API. This program displays the vendor name, the version implemented, the renderer name and the extensions of the current OpenGL 3D accelerator.

Check our FAQ question, updated (November 2021).

What's new ?


6.3.8  - Latest Version (2022-11-14)
- Updated DirectX 12 and Shader Model detection (up to 6.7)
- Other bug fixes and improvements.

- Added sRGB and Linear framebuffer for Vulkan and OpenGL rendering tests.
- Other bug fixes and improvements.

- Fix accents in portuguese language.
- Updated vulkan rendering tests and compliance
- Other bug fixes and improvements.

- Changed debug.log to glview.log
- Added more information on failed rendering context not being initialized
- Other bug fixes and improvements.

- Address issue with GDI only devices.
- Address HDR rendering test on Vulkan

- Added Vulkan rendering tests!
- Optimization in GL rendering tests.
- Added command line parameter glview.exe -fast, for loading the UI without the GL database.

- Address compability with nVidia when starting the rendering tests without multisampling.

- New OpenGL code, and preparing for Vulkan rendering tests
- Translation to russian, french in the PC version.
- Android version has now CPU reporting and Vulkan reporting.

- Android Vulkan Database
- Support for virtual renderer (without monitors)
- Vulkan extensions database browser.
- Entirely rewritten interface in WPF, optimized for Windows 10, search functions, new high definitions icons, new vendors icons and more.
- Vulkan extensions database browser
- New generated database, up to 10,000 renderers, with version and more
- Faster loading times,
- New CPUID section with processor name and number.
- Many bug fixes and improvements.

- Updated video memory size using AMD and nVidia GL Extensions. This now reports more than 4GB size. Adding GPU processor clock for AMD video cards.
- nVidia and AMD drivers version are now reported properly.
- Fixed an issue with WMI 'AdapterRAM' crashing at startup.
- Improved database navigation.

5.2.0 (2019-03)

- Updated processor detection : Added more processor family.
- Version is displayed when starting the application.
- Improved database navigation.

5.1.4 (2019-01)

- Improved Vulkan Support
- Support for high density screens
- Improved database


OpenGL Extension Viewer is reliable software which displays the vendor name, the version implemented, the renderer name, and the extensions of the current OpenGL 3D accelerator. Many OpenGL extensions, as well as extensions to related APIs like GLU, GLX, and WGL, have been defined by vendors and groups of vendors. The extension registry is maintained by SGI and contains specifications for all known extensions, written as modifications to the appropriate specification documents. The registry also defines naming conventions, guidelines for creating new extensions and writing suitable extension specifications, and other related documentation.

OpenGL Extensions Viewer is free of charge and was awarded by Softpedia as 100% FREE No Spyware, No Adware, No Viruses

You can download the latest version of OpenGL Extensions Viewer (GLview) from those selected stores for free

Or, if you run Windows 7 or later, click here to download for Windows:

Download For Windows
SHA-256 Checksum: glview638-setup.exe 2646CC4D5BF8DCA760A57CC966B29B21985333F5819A5E644E3872D9BA2A53B4

Also available, DirectX Extensions Viewer on Windows Store

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Official OpenGL Extensions Viewer Facebook page >>>

A Question ? Ask on OpenGL reddit page, we will now answer ! >>>


After launching the application, select one of the following tab:
Display Modes
Pixel Format

Display system information and core feature test.

Display extensions, sorted by vendor. If you have an Internet connection, you can retrieve from the extensions's specifications that explain the available extensions. You can click on extension and press 'Search' for getting extension's specification from severals different databases. You can also use the left button mouse.

Display Modes
Display all supported display modes.

Pixel Formats
Display all supported pixel format
Create a report based from current configuration.

The OpenGL diagnostic tool performs some OpenGL initialisation and graphical test. It will use the desktop resolution. So in case of slow downs or initialisation errors, use a smaller desktop resolution. 

OpenGL 1.1 : use the standard OpenGL without extension usage.
OpenGL 1.2 : OpenGL test using GL_lock_array and glDrawElement.
OpenGL 1.3 : OpenGL using GL_lock_array and multitexturing.
OpenGL 1.4 : OpenGL test using GL_lock_array and multitexturing using a DOT3 shading and an ARB vertex program code.
OpenGL 1.5 : OpenGL test using Vertex Buffer Object.
OpenGL 2.0 : OpenGL test using a GLSL 1.0 program.
OpenGL 2.1 : OpenGL test using pixel buffer object.
OpenGL 3.0 : OpenGL test using OpenGL 3.0 Forward Context (only supported under Windows). 
 execom / main code.
arekkusu / cocoa code.
genevois / web site / graphist.

Here a list of useful links, related to OpenGL Extensions and Programming:
Apple' s OpenGL Extensions Guide
OpenGL® Extension Registry
Delphi3D PC OpenGL Hardware Registry
Understanding and Detecting OpenGL Functionality
MacOS X OpenGL information



A very extensive list of details of all extensions available of your system, which OpenGL functions are implemented and more.
A core feature set check also show how well from OpenGL version 1.2 to 4.0 are implemented in your system.
More than 450 extensions reported and collected since 2000!

OpenGL 1.1 / 1.2 OpenGL 1.3

OpenGL Extensions Viewer has been suggested by
in the OpenGL technical FAQ (see 23.050) (**)
and by nVidia as Developer Resources.

Vulkan Extensions are available in the Vulkan Report Section

OpenGL 1.1 / 1.2




A database of all known renderers for Windows and MacOSX is available. If an renderer is being updated, you can submit to the server. You can also update to the latest database directly from the application.

OpenGL 1.1 / 1.2 


Q> I'm using a software that requires OpenGL 2.1, but I'm not able to find the driver to load
A> You can't really download OpenGL but only download display drivers that have OpenGL. Check with OpenGL Extensions Viewer what version it shows. If it reporting 'GDI Renderer', it means that something is blocking OpenGL from working. Sometimes an environement variable with QT_OPENGL solves the problem. 

Q> I want to run Blend on my computer. It requires OpenGL 3.3 or above. OpenGL Extensions Viewer is reporting '4.613572 Core Profile Compability 19.11.1'. Will this version works ?
A> Yes it will works, the version is the first figures in the version name, in this case it is 4.6

Q> I've downloaded the latest version of OpenGL, because it was necessary to play a certain game. This game requires OpenGL 2.1 or above. but once I open, it says it is version 1.1
A> As said, it means something is blocking OpenGL to works. For example, opening an OpenGL software thru a remote distance, or virtual machine doesn't works most of the time. Check with OpenGL Extensions Viewer to see which version is installed, especially the DirectX version. If you have DirectX 11, there is good chance that OpenGL is compatible but a software, or resolution is blocking it.


Initial released in 2000
Available for iOS, Android, Windows 7 and above, macOS